aerozg

I don't really think this will be a big issue, we just have to see what others have done, i don't expect there to be much difference in the protocols used between this and other stations/sensors that work on 433.92MHz as they are pretty standard. Will have to read some more tho.

I guess we have identified the brands under which this same weather station is sold in different countries, and that is a good thing.

Great news!Reading around on other forums, I found out that we do not even need a receiver! We can just connect the "official" receiver to PC through the audio board to be able to detect the signals and reverse engineer it!

This is the result for an Oregon Scientific sensor (TH138) I have (for another weather station):

I used this sensor because it only transmits temperature values and because somebody else already examined a sensor similar to this one:http://alyer.frihost.net/thn128decoding.htm

Examining the Auriol sensors will be a bit more tricky as they transmit quite complex data:

I don't know which sensor(s) transmitted these data, as all of them were powered; it will be easy to grab just the udometer (by un-powering all the others), but it will be quite tricky to separate data for Temperature, Wind and umidity! :-?

I opened the receiving station, and I located the receiver part: it's a small circuit physically separated from the main; it is connected through 3 wires, labeled as GND, PWR and (unreadable); of course I guessed (unreadable) was the signal.

So, I connected GND to GND of the earphone cable connected to PC, and SIGNAL to one channel of the cable.Then I used Audacity to record "sound", using a MONO track: I had to determine by 2 random attempts which wire to connect to to get the signal recorded.Then it was just a matter of sitting and waiting for signal bursts to come from the thermometer.

Didn't yet have enough time to examine weather station data (they're very complex, and I seeone short signal every 30 seconds and one long and complex signal every 4 minutes, it's quite hard to figure out what's going on).Besides, I'm not able to use the RX I bought to get the signals, I'm missing something... Isn't it enough to connect GND, VCC and RX oin these small devices?

aerozg

Very interesting stuff! I will try to replicate what you did and see if i can come up with anything. I noticed the LED on my anemometer assembly flashes red every 30 seconds, but i didn't know there is a signal sent every 4 minutes.